I have a few close friends that are competing in the higher ranks of national NPC shows. The amount of genetics and drugs needed is unreal to even go pro much less make a living at it. It is a great goal and a lofty ambition, but I wouldn't bank on it.
I am not saying you won't, but with the genetics I see the odds are stacked against you. I know at your age IFBB pros seem glamorous and all, but that is not the reality. It is a hard, dedicated, and drug filled lifestyle with no guarantees.
I agree with though just keep at it and hitting small goals. You are still young with plenty of time to grow and advance. Just remember it is a marathon and not a sprint.